Mazda 3: lighting & signalling MOT failures
Of the 671,343 Mazda 3 MOT tests in this dataset, 8.8% recorded at least one lighting & signalling failure. It shows up most on 2004 and 2005 cars.
Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair cost: £10–£150 (rough UK ballpark, not a quote).
Lighting & signalling failures by year
| Model year | Tests | Fail rate |
|---|---|---|
| 2004 | 7,031 | 21.5% |
| 2005 | 22,466 | 21.5% |
| 2006 | 30,751 | 19.9% |
| 2007 | 39,630 | 18.0% |
| 2008 | 46,133 | 18.2% |
| 2009 | 52,784 | 14.3% |
| 2010 | 55,843 | 12.9% |
| 2011 | 35,896 | 12.3% |
| 2012 | 31,169 | 9.0% |
| 2013 | 31,388 | 6.2% |
| 2014 | 51,647 | 2.5% |
| 2015 | 71,612 | 2.6% |
| 2016 | 63,791 | 2.3% |
| 2017 | 48,473 | 2.0% |
| 2018 | 39,185 | 1.7% |
| 2019 | 18,863 | 1.5% |
| 2020 | 13,444 | 2.0% |
| 2021 | 8,377 | 2.0% |
| 2022 | 2,633 | 2.4% |
Methodology & source. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.